Cutthroat Montana Flume, 3in

Cutthroat or Montana flumes are so named because they resemble Parshall flumes with the throat "cut out". They are formed by directly connecting a 6:1 converging section to a similar diverging section. Thus, they consist of a converging level inlet section with vertical sidewalls and a diverging level outlet section also with vertical sidewalls. They do not have any parallel walls forming a straight throat and, thus, belong to a class of throatless flumes. The converging and diverging walls do not necessarily match those of other flumes in either converging or diverging slope or length. The primary objective of their development was construction simplicity compared to Parshall flumes. They are about half the length of the same size Parshall Flume and are best used in high gradient streams with free fall of the end that would not create back pressure.

Materials of Construction: Molded reinforced fiberglass polyester, aluminum, galvanized steel or stainless steel.

Installation: 2 inch top and end flanges for connection to concrete channels. Anchor clips attached to sidewalls for connection to rebar or for use in free-standing installation (stainless steel threaded rod with nuts and washers as necessary).

Available Options:

• Bubble Tube- Removable 304 Stainless Steel bubble tube with molded side cavity.
• Sampler Tube - Removable 304 Stainless Steel sampler tube (3/8" dia. connector) with molded side cavity.
• Ultrasonic Mounting Bracket
• Submerged Probed Cavity with molded side cavity
• Stilling Well Connection - 2" NPT
• Level - Bullseye bubble level
• Staff Gage - scale affixed to inside of flume
• Calibrated in feet, tenths and 100ths
• Calibrated in mm and cm
• Scales other than standard (measuring in MGD, GPM, etc.)